:root{color-scheme:light;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;--pink: #ff007f;--pink-dark: #d9006c;--ink: #17141d;--muted: #716c78;--bg: #f7f6fa;--card: #ffffff;--line: #eae6ee;--soft: #f2eff4;--success: #0b8f4d;--danger: #c92242;--shadow: 0 12px 36px rgba(41, 23, 46, .08)}:root[data-theme=dark]{color-scheme:dark;--ink: #f8f5fa;--muted: #bdb5c2;--bg: #121015;--card: #1d1921;--line: #342d38;--soft: #29232e;--shadow: 0 16px 40px rgba(0, 0, 0, .32)}*{box-sizing:border-box}html{background:var(--bg);min-height:100%}body{margin:0;min-height:100vh;background:var(--bg);color:var(--ink)}body.app-body{height:100dvh;min-height:100dvh;overflow:hidden;padding:0}body.app-body #app{height:100dvh;overflow:hidden}button,input,select,textarea{font:inherit}button{color:inherit}button,a{-webkit-tap-highlight-color:transparent}.boot-loader,.auth-shell{display:grid;place-items:center;padding:24px}.boot-loader{min-height:100vh}.boot-loader{align-content:center;color:var(--muted)}.boot-loader span,.busy span{width:38px;height:38px;border:4px solid var(--line);border-top-color:var(--pink);border-radius:50%;animation:spin .8s linear infinite}.boot-loader p{margin:14px 0}@keyframes spin{to{transform:rotate(360deg)}}.auth-shell{width:100%;height:100dvh;min-height:100svh;overflow-y:auto;padding:max(18px,env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) max(18px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left));background:radial-gradient(circle at top,rgba(255,0,127,.13),transparent 40%),var(--bg)}.auth-card{width:min(100%,430px);padding:34px;background:var(--card);border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow)}.auth-card input{font-size:16px}.auth-logo{display:block;width:min(100%,310px);height:auto;margin:0 auto 24px;border-radius:14px}.auth-card h1{margin:6px 0 8px;font-size:clamp(1.85rem,5vw,2.35rem);letter-spacing:-.04em}.auth-card .muted{margin:0 0 24px}.eyebrow{display:block;color:var(--pink);font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.muted{color:var(--muted)}.stack{display:grid;gap:14px}label{display:grid;gap:7px;color:var(--muted);font-size:.86rem;font-weight:650}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;background:var(--soft);color:var(--ink);outline:none;transition:border .2s,box-shadow .2s}input:focus,select:focus,textarea:focus{border-color:var(--pink);box-shadow:0 0 0 4px #ff007f1a}textarea{resize:vertical}.check{display:flex;grid-template-columns:auto 1fr;align-items:center;gap:9px}.check input{width:auto;accent-color:var(--pink)}.btn{border:0;border-radius:14px;padding:13px 18px;font-weight:800;cursor:pointer;transition:transform .15s,opacity .15s,background .15s}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.55;cursor:wait}.btn.primary{background:var(--pink);color:#fff;box-shadow:0 8px 18px #ff007f2e}.btn.primary:hover{background:var(--pink-dark)}.btn.ghost{background:var(--soft);color:var(--ink);border:1px solid var(--line)}.btn.dark{background:#17141d;color:#fff}.btn.danger{color:var(--danger)}.btn.small{padding:8px 11px;border-radius:10px;font-size:.78rem}.btn.full{width:100%;margin-top:12px}.btn.logout{display:block;width:min(100%,420px);margin:20px auto 8px;background:#18151d;color:#fff}.link-button{display:block;margin:16px auto 0;border:0;background:transparent;color:var(--pink);cursor:pointer;font-weight:700}.icon-danger{display:grid;place-items:center;min-width:30px;height:30px;border:0;border-radius:9px;background:#c922421a;color:var(--danger);font-size:1.1rem;cursor:pointer}.impersonation-banner{position:fixed;inset:0 0 auto;z-index:40;height:58px;display:flex;align-items:center;justify-content:center;gap:22px;padding:max(7px,env(safe-area-inset-top)) 12px 7px;background:linear-gradient(90deg,#ffd438,#ffbf2f);color:#2b2100;box-shadow:0 6px 16px #573d0024}.impersonation-banner div{display:grid}.impersonation-banner strong{font-size:.9rem}.impersonation-banner span{font-size:.72rem}.topbar{position:fixed;inset:0 0 auto;z-index:30;height:calc(52px + env(safe-area-inset-top));display:flex;align-items:center;justify-content:space-between;gap:10px;padding:max(6px,env(safe-area-inset-top)) 10px 6px;background:color-mix(in srgb,var(--bg) 95%,transparent);border-bottom:1px solid color-mix(in srgb,var(--line) 78%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.has-impersonation .topbar{top:58px}.topbar-left{display:flex;align-items:center;min-width:0;gap:8px}.topbar-logo{display:grid;place-items:center;flex:none;width:44px;height:36px;padding:4px;border:0;border-radius:9px;background:#151217;cursor:pointer}.topbar img{width:38px;height:26px;border-radius:0;object-fit:contain}.topbar h1{margin:0;overflow:hidden;font-size:1.12rem;line-height:1.1;text-overflow:ellipsis;white-space:nowrap}.topbar-actions{display:flex;align-items:center;gap:8px;flex:none}.contact-nav-button{position:relative;width:36px;height:36px;display:grid;place-items:center;padding:0;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);cursor:pointer}.contact-nav-button>span{font-size:1rem}.contact-nav-button.active{border-color:color-mix(in srgb,var(--pink) 42%,var(--line));background:color-mix(in srgb,var(--pink) 9%,var(--card));color:var(--pink)}.contact-nav-button b{position:absolute;top:-6px;right:-7px;min-width:19px;height:19px;display:grid;place-items:center;padding:0 5px;border:2px solid var(--bg);border-radius:999px;background:var(--pink);color:#fff;font-size:.58rem;line-height:1}.icon-btn{width:36px;height:36px;display:grid;place-items:center;flex:none;padding:0;border:0;border-radius:50%;background:var(--card);box-shadow:0 4px 12px #29172e14;font-size:1.7rem;cursor:pointer}.credits{flex:none;display:flex;align-items:center;gap:5px;padding:6px 9px;border-radius:999px;background:var(--card);border:1px solid var(--line);font-size:.86rem;font-weight:900}.credits span{color:var(--pink);font-size:.76rem}.app-main{width:min(100%,760px);height:calc(100dvh - 116px - env(safe-area-inset-top) - env(safe-area-inset-bottom));margin:calc(52px + env(safe-area-inset-top)) auto 0;padding:9px 9px 18px;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth;-webkit-overflow-scrolling:touch}.has-impersonation .app-main{height:calc(100dvh - 174px - env(safe-area-inset-top) - env(safe-area-inset-bottom));margin-top:calc(110px + env(safe-area-inset-top))}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:0 7px 22px #29172e0b}.app-main>.card{padding:20px;margin-bottom:16px}.card h2{margin:4px 0 14px;font-size:1.25rem}.card p{line-height:1.55}.alert{padding:13px 15px;margin-bottom:14px;border-radius:14px}.alert.error{background:#c922421a;border:1px solid rgba(201,34,66,.25);color:var(--danger)}.alert button{float:right;border:0;background:transparent;color:inherit;font-weight:800;cursor:pointer}.toast{position:fixed;z-index:50;left:50%;bottom:92px;transform:translate(-50%);width:max-content;max-width:calc(100vw - 32px);padding:12px 17px;border-radius:13px;background:#1b1820;color:#fff;box-shadow:0 12px 30px #0000003d;font-size:.88rem}.busy{position:fixed;z-index:45;top:calc(59px + env(safe-area-inset-top));right:12px;width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--line);border-radius:13px;background:var(--card);box-shadow:0 8px 22px #29172e29;pointer-events:none}.busy span{width:18px;height:18px;border-width:2px;background:transparent}.bottom-nav{position:fixed;z-index:35;inset:auto 0 0;height:calc(64px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(5,1fr);padding:0 0 env(safe-area-inset-bottom);border-top:1px solid color-mix(in srgb,var(--line) 82%,transparent);background:color-mix(in srgb,var(--card) 96%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.bottom-nav button{display:grid;place-items:center;align-content:center;gap:2px;border:0;background:transparent;color:var(--ink);cursor:pointer}.bottom-nav button span{font-size:1.15rem;line-height:1}.bottom-nav button small{margin-top:2px;font-size:.61rem;font-weight:800;color:var(--muted)}.bottom-nav button.active,.bottom-nav button.active small{color:var(--pink)}.admin-preview-card{display:grid;grid-template-columns:1fr minmax(230px,360px);align-items:center;gap:24px;border-color:#ff007f38;background:linear-gradient(135deg,var(--card),color-mix(in srgb,var(--pink) 5%,var(--card)))}.admin-preview-card h2{margin-bottom:4px}.admin-preview-card p{margin:0;color:var(--muted);font-size:.86rem}.feed,.challenge-list,.user-list{display:grid;gap:12px}.class-list{display:grid;gap:0;overflow:hidden;border:1px solid var(--line);border-radius:16px;background:var(--card)}.class-list:has(>.empty){border:0;background:transparent}.notice{padding:18px}.notice p{margin:12px 0 0}.notice.hidden-item{opacity:.58}.card-meta,.row{display:flex;align-items:center;gap:10px}.card-meta{justify-content:space-between;color:var(--muted);font-size:.75rem}.row.end{justify-content:flex-end;margin-top:12px}.tag{display:inline-flex;width:max-content;padding:5px 9px;border-radius:999px;background:var(--soft);color:var(--muted);font-size:.7rem;font-weight:800}.tag.success{background:#0b8f4d1c;color:var(--success)}.tag.danger{background:#c922421a;color:var(--danger)}.empty{min-height:250px;display:grid;place-items:center;align-content:center;text-align:center;color:var(--muted)}.empty>span{display:grid;place-items:center;width:58px;height:58px;border-radius:18px;background:#ff007f17;color:var(--pink);font-size:1.45rem}.empty h2{margin:14px 0 4px;color:var(--ink)}.empty p{margin:0}.week-card{position:sticky;z-index:12;top:8px;padding:14px;margin-bottom:14px;background:color-mix(in srgb,var(--card) 97%,transparent);box-shadow:0 10px 28px #29172e1a;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.week-card.month-expanded{position:relative;top:auto}.week-head{display:grid;grid-template-columns:minmax(0,1fr) 36px 36px 36px;align-items:center;gap:4px;margin-bottom:8px}.week-head strong{overflow:hidden;text-transform:lowercase;text-overflow:ellipsis;white-space:nowrap}.calendar-glyph{display:grid;place-items:center;color:var(--muted)}.calendar-glyph[aria-expanded=true]{background:color-mix(in srgb,var(--pink) 10%,transparent);color:var(--pink)}.calendar-glyph svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}.week-head button{height:36px;border:0;border-radius:12px;background:transparent;cursor:pointer;font-size:1.5rem}.week-labels{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));margin-bottom:3px;color:var(--muted);text-align:center;text-transform:lowercase}.week-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}.month-grid{row-gap:3px;animation:calendar-expand .2s ease-out}@keyframes calendar-expand{0%{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.day{width:100%;max-width:48px;height:auto;aspect-ratio:1;display:grid;place-items:center;justify-self:center;padding:0;border:0;border-radius:50%;background:transparent;cursor:pointer}.day strong{font-size:1.05rem}.day.today{background:color-mix(in srgb,var(--pink) 58%,white);color:#fff}.day.selected{background:var(--pink);color:#fff}.day.outside-month{opacity:.34}.day.outside-month.selected{opacity:1}.class-card{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;padding:8px 11px;border:0;border-top:1px solid var(--line);border-radius:0;box-shadow:none}.class-card:first-child{border-top:0}.time-block{align-self:stretch;display:grid;align-content:center;text-align:center;border-radius:15px;background:#ff007f17;color:var(--pink)}.time-block strong{font-size:1.15rem}.time-block small{font-size:.68rem}.class-info{display:grid;gap:4px;min-width:0}.class-info strong{font-size:.92rem}.class-info span,.class-info small{color:var(--muted);font-size:.75rem}.class-info small{line-height:1.35}.class-action{display:flex;align-items:center;justify-content:flex-end;gap:7px;flex-wrap:wrap}.class-main-action,.admin-remove-class{min-width:108px;border-radius:999px}.contacts-overview{display:flex;align-items:center;justify-content:space-between;gap:18px;border-color:color-mix(in srgb,var(--pink) 24%,var(--line));background:linear-gradient(135deg,var(--card),color-mix(in srgb,var(--pink) 5%,var(--card)))}.contacts-overview h2{margin-bottom:4px}.contacts-overview p{margin:0;color:var(--muted);font-size:.82rem}.contacts-overview .btn{flex:none;display:flex;align-items:center;gap:8px}.button-badge{min-width:20px;height:20px;display:grid;place-items:center;padding:0 5px;border-radius:999px;background:#fff;color:var(--pink);font-size:.66rem}.contacts-dashboard{display:grid;gap:16px}.contacts-dashboard-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.contacts-dashboard-head h2{margin-bottom:5px}.contacts-dashboard-head p{max-width:490px;margin:0;color:var(--muted);font-size:.82rem}.contact-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.contact-stats>div{display:grid;gap:2px;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}.contact-stats strong{font-size:1.25rem}.contact-stats span{color:var(--muted);font-size:.7rem;font-weight:750;text-transform:uppercase;letter-spacing:.06em}.contact-stats .unread{border-color:color-mix(in srgb,var(--pink) 30%,var(--line));background:color-mix(in srgb,var(--pink) 8%,var(--card))}.contact-stats .unread strong{color:var(--pink)}.contact-filters{display:grid;gap:12px}.contact-search{position:relative;display:block}.contact-search>span{position:absolute;z-index:1;left:13px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:1.1rem}.contact-search input{padding-left:38px}.contact-filter-row{display:flex;align-items:end;justify-content:space-between;gap:12px}.contact-status-filters{display:flex;gap:6px;flex-wrap:wrap}.contact-status-filters button{display:flex;align-items:center;gap:6px;padding:8px 11px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--muted);font-size:.75rem;font-weight:800;cursor:pointer}.contact-status-filters button.active{border-color:var(--pink);background:var(--pink);color:#fff}.contact-status-filters b{font-size:.65rem}.contact-interest-filter{min-width:170px;gap:4px;font-size:.7rem}.contact-interest-filter select{padding:8px 34px 8px 10px;border-radius:11px;font-size:.78rem}.site-contact-list{display:grid;gap:10px}.contacts-page-list{padding-bottom:8px}.site-contact-card{display:grid;gap:10px;padding:15px;border:1px solid var(--line);border-radius:16px;background:var(--card);box-shadow:0 6px 18px #29172e09;transition:border-color .2s,opacity .2s,background .2s}.site-contact-card[hidden],.contact-filter-empty[hidden]{display:none!important}.site-contact-card.unread{border-color:color-mix(in srgb,var(--pink) 35%,var(--line));background:linear-gradient(135deg,var(--card),color-mix(in srgb,var(--pink) 4%,var(--card)))}.site-contact-card.read{opacity:.78}.site-contact-card .card-meta strong{display:flex;align-items:center;gap:7px;overflow:hidden;color:var(--ink);font-size:.92rem;text-overflow:ellipsis;white-space:nowrap}.contact-status-dot{width:8px;height:8px;flex:none;border-radius:50%;background:var(--line)}.site-contact-card.unread .contact-status-dot{background:var(--pink);box-shadow:0 0 0 4px #ff007f17}.contact-card-tags{display:flex;gap:6px;flex-wrap:wrap}.site-contact-card.unread .contact-read-tag{background:#ff007f1c;color:var(--pink)}.site-contact-card p{margin:0;font-size:.84rem;overflow-wrap:anywhere}.site-contact-details{display:flex;gap:6px 14px;flex-wrap:wrap;color:var(--muted);font-size:.75rem}.site-contact-actions{display:flex;gap:8px;flex-wrap:wrap}.site-contact-actions a{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}.contact-read-button{margin-left:auto}.contact-filter-empty{min-height:220px}.notification-center>.muted{margin:-6px 0 12px;font-size:.8rem}.notification-recipients{margin:0 0 16px;border:1px solid var(--line);border-radius:13px;background:var(--soft)}.notification-recipients summary{padding:11px 13px;cursor:pointer;font-weight:800}.notification-recipients>div{max-height:230px;overflow-y:auto;padding:0 13px 10px}.notification-recipients p{display:grid;gap:2px;margin:0;padding:8px 0;border-top:1px solid var(--line)}.notification-recipients span{color:var(--muted);font-size:.73rem}.notification-form{padding-top:2px}.notification-history{display:grid;gap:8px;margin-top:20px}.notification-history h3{margin:0 0 2px;font-size:.96rem}.notification-log{overflow:hidden;border:1px solid var(--line);border-radius:13px;background:var(--soft)}.notification-log>summary{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px 12px;cursor:pointer;list-style:none}.notification-log>summary::-webkit-details-marker{display:none}.notification-log>summary>span{display:grid;gap:2px;min-width:0}.notification-log>summary strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.84rem}.notification-log>summary small{color:var(--muted);font-size:.68rem}.notification-log>summary>b{color:var(--pink);font-size:.67rem;text-align:right}.notification-log-body{padding:0 12px 10px;border-top:1px solid var(--line)}.notification-log-body>p:first-child{margin:10px 0;font-size:.8rem}.delivery-summary{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:7px}.delivery-summary span{padding:4px 7px;border-radius:999px;background:var(--card);color:var(--muted);font-size:.66rem;font-weight:750}.delivery-person{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0;padding:7px 0;border-top:1px solid var(--line)}.delivery-person>span{display:grid;min-width:0}.delivery-person strong{font-size:.75rem}.delivery-person small{overflow:hidden;color:var(--muted);font-size:.65rem;text-overflow:ellipsis}.delivery-status{flex:none;padding:4px 7px;border-radius:999px;background:var(--card);color:var(--muted);font-size:.62rem}.delivery-status.received,.delivery-status.opened{background:#0b8f4d1c;color:var(--success)}.delivery-status.failed{background:#c922421a;color:var(--danger)}.challenge-card{overflow:hidden}.challenge-head{width:100%;display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:12px;padding:16px;border:0;background:transparent;text-align:left;cursor:pointer}.challenge-head>div{display:grid;gap:3px}.challenge-head small{color:var(--muted)}.challenge-head>span:last-child{font-size:1.6rem;transition:transform .2s}.challenge-card.open .challenge-head>span:last-child{transform:rotate(90deg)}.challenge-icon{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;background:#ff007f1a;color:var(--pink)}.challenge-body{display:grid;gap:15px;padding:0 16px 16px;border-top:1px solid var(--line)}.exercise-list{display:grid;gap:8px;margin-top:14px}.exercise-list>div{display:grid;grid-template-columns:34px 1fr auto auto;align-items:center;gap:10px}.exercise-list>div>span{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--soft);color:var(--pink);font-weight:900}.exercise-list small{color:var(--muted)}.ranking{display:grid;gap:7px}.ranking-entry{overflow:hidden;border-radius:12px;background:var(--soft)}.ranking-row{width:100%;display:grid;grid-template-columns:32px minmax(0,1fr) auto 18px;align-items:center;gap:8px;padding:10px;border:0;background:transparent;color:var(--ink);text-align:left;cursor:pointer}.ranking-row b{color:var(--pink)}.ranking-row span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ranking-row i{color:var(--muted);font-size:1.3rem;font-style:normal;transition:transform .18s}.ranking-entry.open .ranking-row i{transform:rotate(90deg)}.ranking-details{display:grid;gap:7px;padding:0 11px 11px 51px}.ranking-details[hidden]{display:none!important}.ranking-details>div{display:flex;justify-content:space-between;gap:12px;padding-top:7px;border-top:1px solid var(--line);font-size:.76rem}.ranking-details span{color:var(--muted)}.ranking-total strong{color:var(--pink)}.score-form{display:grid;gap:12px;padding:14px;border-radius:15px;background:var(--soft)}.score-form h3{margin:0}.score-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.challenge-student-picker{min-width:0;display:grid;gap:8px;margin:0;padding:0;border:0}.challenge-student-picker legend{margin-bottom:2px;color:var(--ink);font-size:.86rem;font-weight:800}.challenge-student-search{gap:4px}.challenge-student-search span{font-size:.72rem}.challenge-student-search input{min-height:40px;padding:9px 11px;background:var(--card)}.show-unenrolled{width:max-content;color:var(--ink);font-size:.75rem}.challenge-student-options{max-height:230px;display:grid;gap:5px;overflow-y:auto;overscroll-behavior:contain}.challenge-student-option{display:grid;grid-template-columns:20px minmax(0,1fr);align-items:center;gap:8px;padding:8px 10px;border:1px solid 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